Leather-skiving machine.



E. E. LANE.`

LEATHER SKIVING MACHINE.

APPLICATION FILED IIIAR.2I. 1912.

PeIenIed Feb.29,1916.

4 SHEETS-SHEET l.

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THE COLUMBIA PLANDGRAPH co.. WASHINGTON, D, C.

E. E. LANE.

LEATHER SKIVING MACHINE.

APPLICATION FILED MAR- 2I. 191.2.

Patented Feb. 29

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MTA/55555 Y New .Cc|.. WASHINGTON, D. C.

4 SHEETS-SHEET 3.

Patented Feb. 29, 1916.

E. E. LANE.

LEATHER SKIVING MACHINE.

APPLICATION FILED MAR. 21. |912.

'ETI

lili.

E. E. LANE.

LEATHER SKIVING MACHINE.

APPLlcArloN FILED MAR. 21, 1912.

1,173,359. Patented Feb.29,1916.

4 SHEETS-SHEET 4.

" man strains PATENT OFFICE.

ELMER E. LANE, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SI-IOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

LEATHER-SKIVING MACHINE.

Speccation of Letters Patent.

Patented Feb. 29, 1916.

To all whom it may concern:

Be it known that I, ELMER E. LANE, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Leather-Skiving Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to leather skiving machines which are used in the manufacture of boots and shoes, and more particularly to that class or type of machine designed to operate upon counter and boX toe blanks. Skiving machines of this class are commonly provided with a die roll having a die cavity into which the blank is forced by pressure mechanism, usually in the form of a pressure roll.

One of the objects of the present invention is to improve the above described type ofy machine by providing pressure mechanisml7 which shall insure the proper seating of; the blank throughout the die cavity. This] object is accomplished by so constructing and arranging the pressure mechanism that different pressures may be applied to dif` ferent portions of the blank and a sufficient pressure exerted upon each portion thereof to force the same firmly into the correif sponding portion of the die cavity. In the preferred form of the present invention such pressure mechanism comprises a presj;

sure roll having a plurality of unyielding pressure disks, the work engaging faces of Y which are differently shaped so as to penetrate the work with greater or less facility, and thereby to exert a lighter or heavier pressure upon the work.

Another object of the present invention is to provide a plurality of presser feet fori forcing the work into the die cavity, these, pressure feet preferably supplementing the` action of a pressure roll, and also preferably` serving as strippers to strip off or remove the leather from the roll.`

Another object of the present invention is to provide this type of machine with a hopper or magazine, the walls of which may be adjusted to adapt the hopper for usewith different sizes and shapes of counter or box toe blanks or other articles to be skived.

Other features of the present invention consist in certain devices and combina tion of devices hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art.

The various features of the present invention will be readily understood from an inspection of the accompanying drawings, in which Figure 1 is a side elevation of a leather skiving machine embodying the invention in the best form at present devised; Fig. 2 is a perspective of the machine head; Fig. 3 is a sectional elevation of the skiving knife, die roll, and pressure devices on line 3 3, Fig. 4; Fig. 4 is a rear elevation of the skiving knife and pressure devices; Fig. 5 is a rear elevation, partly in section, of the die and pressure rolls; Figs. 6 and 7 are sectional elevations respectively on the lines 6 6 and 7 7, Fig. 5, looking in the direction of the arrows; Fig. 8 is a detail in front elevation of the devices for adjusting the hopper walls; Fig. 9 is a sectional elevation on the line 9 9, Fig. 8, looking in the direction of the arrows; Fig. 10 is a sectional `plan on the line l0 10, Fig. 8, and Figs. 11 and 12 are details showing different adfjus'tments of the walls of the hopper for use with boX toe blanks and counter blanks re- ;jspectively.

fi In the drawings, which illustrate the present invention as embodied in a machine of Tthe general type shown in Letters Patent l No. 969,987, September 13, 1910, to J. R. Scott, the relative arrangement of skiving knife 1, die roll 2, and pressure roll 3, the

's method of mounting said rolls upon the shafts 5 and 6 respectively, and the method 'of actuating the rolls from the main shaft Q7, are all substantially as illustrated in said 'patent. The pressure roll 3, however, differs essentiallyy in construction from the roll of 'said patent, and comprises a hollow sleeve or hub 8 upon which are keyed a plurality of pressure disks 9 provided with the teeth 10 upon their peripheries. These pressure disks are spaced apart by means of washers or rings 11, also keyed upon sleeve 8, the sleeve, disks and rings all being rigidly secured together.

In order that the disks may exert different pressures upon different portions of the .c Work and v of an amount sufficient to insure each portion of the blank being forced firmly in the die cavity, the teeth on the peripheries of the different disks are varied in number and size. `Where the greatest pressure is required, which generally is opposite the deepest portion ofthe die cavity, a larger number of teeth are provided, and of a smaller size, while opposite the shallower portion of the cavity, Where less pressure is necessary, the number of teeth in the disks is decreased and their size increased. Where the least pressure is required, as beyond the limits of the die cavity, the fewest and largest teeth are employed. Inasmuch as the pressure Vroll and its disks are unyielding, the teeth of the latter Will be forced into the Work to a greater or less extent, andA obviously the greater the number of teeth in contact with the work, the greater Will be the pressure exerted upon the Work to force it against the die roller and into the die cavity. In the illustrated embodiment of the present invention the number of teeth on the disks vary from 50 teeth of relatively large size near the ends, to teeth of small size at the middle portion of the roll` the intermediate portions having disks with 60 teeth medium size.

This construction, it will be observed, provides a pressure roll which is simple in construction, efficient in operation to seat properly the blank in all portions of the die cavity, and capable of long continued use Without requiring adjustment or replacement of springs or small moving parts.

In the machine of the drawings the blank 12 is also forced against the die roll by a series of presser feet 13, located between the disks in position to press upon the blank substantially at the bite of the rolls. Each presser foot 13 is carried upon the end of a resilient arm 14 projecting from a collar 15 through which passes the rod 16, spacing disks or Washers 17 being placed between the collars. Normally the collars and disks are clamped tightly together bv means of nuts 18 at each end of the rod` but by loosening the nuts the independent adjustment of the presser feet with relation to the peripheral surface of the die roll is permitted. In order to prevent displacement of the presser feet when the nuts are rotated, stationary Washers 19 are provided against which the nuts bear. These Washers are formed on plates 2() carried by bars 21, each secured to a bracket 22 formed on themachine frame.

In order simultaneously to adjust the presser feet 13 With relation to the bite of the rolls,that is, in the line of feed of the Work, the rod y16 is carried at each end in blocks 23 slidably mounted in slots 24 formed in the opposite side plates of the machine, the blocks being retained in the desired position by means of the bolts 25 these different kinds of blanks.

A passingthrough slots 26 in the said blocks.

it has heretofore been necessary to employ different forms of hopper or magazine for Furthermore, these prior hoppers Were mounted directly upon the table at the front of the machine and in such manner that the change from one hopper to another necessitated the removal of the table each time a change of hoppers was made. The improved form of hopper shown in the accompanying drawings avoids these objectionable features, being equally adapted for box toe and counter blanks as Well as for blanks of otherrshapes, and not requiring the removal of the table when changing from one class of Work to another.

In the impro-ved hopper shown in the accompanying drawings the front Wall is formed by the stationary plate 28 carried by the frame of the machine, While the side Walls or guides are formed of a pair of vertical guide members 29 and 30 which are not only vertically adjustable relatively to the machine and to one another, but which are also bodily and angularly adjustable horizontally With respect to the machine and to o-ne another. Fixed in the brackets 3l on the frame of the machine by means of the set screw 32 is the transverse horizontal rod 33 upon Which the front guiding members 29 are supported by means of the blocks 34. These blocks are movable upon the rod to adjust the members 29 transversely of the los feed, graduations or markings 35 being pro- Y vided on the rod to assist the operator in setting these members in proper position. By means of the set screws 36 the blocks and parts carried thereby may be locked in adjusted position. Pivotally mounted'in a vertical bearing in each block 34 is the sleeve or flange 37 projecting from the hub 38 of each front guiding member 29 (see Figs. 2, 9 and 10), a lock screw 39 (see Fig. 2) securing the member 29 in the desired angular adjustment.

Inorder to assist the operator to obtain a symmetrical angular adjustment of the two front guiding members 29. if that be desired, a yoke 40 has been provided having the engaging edges 41 and carried by the sleeve or hub 42 rotatablv mounted upon the transverse rod 33. By iirst turning this hub to bring the guiding edges 41 at the desired distance from the front plate 28, the operator can then easily adjust the members 29 until each contacts with its guiding edge, When said members Will be at exactly the same distance from the front plate. The

hub 42 may be held in the desired position in any suitable manner, as by frictional or other devices.

Vertical adjustment of the front guiding members 29 is provided by means of the adjusting screw 43 located within the internally threaded sleeve or flange 37 and provided with the milled capstan head 44, the lower face of which bears upon the top of block 34 (see Fig. 9). By rotating this adjusting screw 43, the sleeve or flange 37 will be raised or lowered in its bearing in the block 34 and the desired vertical adjustment obtained for front guiding member 29. In order to lock the adjusting screw 43 to prevent accidental rotation thereof when the member 29 is being angularly adjusted, the screw is provided with the extension 45 projecting into a bearing in the boss 46 on said member 29, a set screw 47 holding the eX- tension of the adjusting screw from rotation therein. In Fig. 9 the parts are shown with the member 29 at the limit of its upward adjustment.

The rear guiding member 30 is supported upon the fro-nt guiding member 29 and is adjustable with relation thereto both horizontally and vertically. The horizontal adjustments of rear member 30 are obtained by means of a pair of levers 48 and 49 pivotally connected at one end by the stud 50 and at their other ends pivotally mounted respectively upon members 29 and 30 near the upper ends thereof (see Figs. 2, 9 and 10.) Another pair of levers similarly pivoted connect the lower ends of said members 29 and 30. Lever 48 o-f the upper pair is pivoted on the extension 45 of adjusting screw 43 in the upper end of member 29 while lever 49 is pivoted upon the extension 51 of the adjusting screw 52 in the upper end of member 30. The lower pair of levers 48 and 49 instead of being pivoted upon adjusting screws are mounted to turn upon fixed studs 53 and 54 secured in bosses or projections 55 from members 29 and 30. Member 30 is held in the desired adjusted position by means of set screws, screw 56 locking lever 48 from rotation upon stud 53, screw 57 locking stud 50 and lever 49 in which the stud is fast, from rotation upon lever 48, and screw 58 locking stud 54 and member 30 rigid therewith from rotation upon lever 49. Member 30 is adjusted vertically with respect to member 29 by means of the adjusting screw 52 carried by the internally threaded boss 59 at the top of said member 30 and provided with .a shoulder 60 to engage the upper face of the hub of lever 49. A set screw 61 is provided for preventing the accidental rotation of the adjusting screw 52 while member 30 is being angularly adjusted. In operation the front guiding members 29 are first adjusted transversely of the feed, then vertically, and

finally angularly, after which the rear guiding member is adjusted to the desired height and then bodily and angularly in the horizontal plane.

From the above description it is evident that the walls or guiding members of the hopper may be adjusted for various shapes and sizes of counter and boX toe blanks as well as for other article to be skived, and whether symmetrical or unsymmetrical. Figs. 1l and 12 illustrate the adjustability of the walls of this improved hopper, the former figure showing adjustment for a boX toe blank while the latter shows the parts in prop-er position for guiding a counter.

One of the advantages of the present form of hopper is than the guides may be so adjusted that the blank cannot be drawn backward out of the hopper on the return or idle stroke of the feed, such an adjustment being illustrated in Fig. 11. It will also be noted that in changing the adjustment of the hopper from one class of work to another there is no necessity of removing the table 62, which by simply loosening the bolts 63 can be drawn backward a sufficient distance to permit the desired adjustment of the hopper guide members, after which the table will be pushed forward and secured in proper position.

In skiving machines of the herein described type it has heretofore been customary to provide a. follower which rests upon the stack of blanks in the hopper and which is actuated to cause it to follow the stack as the stack is reduced in height. These followers have been constructed to engage the stack in a horizontal plane. It sometimes happens that owing to irregularities in the thicknesses of the blanks the stack is higher at one side than at another so that the follower plate onlv engages the stack at the higher side. When this happens the follower does not maintain the stack of blanks in position to allow the blanks to be fed l successively from the hopper. In order to permit the follower to adapt itself to the surface of the stack with which it has engagement, the machine of the drawings is provided with a follower 64 which is socketcated in connection with the foregoing description, and therefore will not be here repeated. I

While one form or embodlment of the present invention has been shown and described, it is to be understood that my invention is not limited thereto, but may be embodied in many other forms and'arrangements.

What l claim is:

1. Pressure mechanism for leather skiving machines, comprising a plurality of pressure devices having differently shaped Work-engaging faces to penetrate the Work With different degrees of facility and thereby to exert different pressures upon different portions of the Work, substantially as described.

2. A skiving machine, having, in combination, a die roll provided With a die cavity, and a plurality of pressure devices, the devices opposite the deeper portions of the die cavity having their Work-engaging faces shaped to exert a greater pressure upon the Work than the pressure devices opposite the shallovver portions of the die cavity, substantially as described. Y

3. Pressure mechanism for leather skiving machines comprising a plurality of pressure disks having differently shaped Work-engag ing faces constructed and arranged to penetrate the Work With different degrees of' facility and thereby to exert different pressures upon the Work, substantially as described.

l. Pressure mechanism for leather skiving machines comprising a plurality of pressure disks provided on their periphery With teeth, a portion of the disks having a greater number of teeth than the remainder, substantially as described.

5. Pressure mechanism for leather skiving machines, comprising a plurality of toothed pressure disks of equal diameter, the teeth on certain of the disks being larger than the teeth on others of' the disks, substantially as described.

6. A leather skiving machine, having, in combination, a. die roll provided With a die cavity, and a pressure roll consisting of a plurality of pressure disks, the disks opposite the deeper portions of the die cavity having their Work-engaging faces shaped to exert a. greater pressure upon the Work than the pressure disks opposite the shallovver portions of the die cavity, substantially as described.

7. A leather skiving machine, having in combination, a die roll provided With a die cavity, and a pressure roll consisting of a plurality of unyielding pressure disks, the disks opposite the deeper portions of the die cavity being constructed and arranged to exert a` greater pressure upon the Work than the pressure disks opposite the shallovver portion of the die cavity, substantially as described.

8. A leather skiving machine, having, in combination, a die roll provided With a die i cavity, and a pressure roll consisting of a and a plurality of pressure-feet mounted onV the same side of the roll as the knife and having an offset Work-engaging face to contact With the Work in front of the knife,

substantially as described.

10. Pressure mechanism for 'leather skiving machines, having, in combination, a pressure roll provided With a plurality of annular grooves, a plurality of presser feet With their free ends located in the grooves, and means positioned in the rear of the pressure roll in the direction of feedfor supporting the presser-feet, substantially as described. Y Y

1l. Pressure mechanism for leather skiving machines, having, in combination, a series of pressure disks, a series of rigidly supported, resilient presser feet located between the disks, and means for'supporting said feet, substantially as described.

12. Pressure mechanism for leather skiving machines, having, in combination, a

series of pressure disks, a series of presser feet located between the disks, a support upon which the feet are rigidly mounted, and means for tipping the support to adjust the feet With relation to the peripheral surface of the disks, substantially as described.

13. Pressure mechanism forV leather skiv-V ing machines, having, in combination, a pressure roll provided With a plurality of annular grooves, and a plurality of combined presser-feet and strippers positioned in the rear of said roll in the direction of feed and having free ends located in the grooves and Within the periphery of the pressure roll, substantially as described.

14. A leather skiving machine, having, in

combination, a die roll, a pressure roll, a

series of presser-feet, a rodvupon which the feet are rigidly mounted, bearings for the rod, and adjusting screws for angularly adjusting the rod in the bearings, substantially as described.

15. A leather skiving machine, having, in combination, a die roll and pressure roll, a series of presser-feet, a support upon which the presser-feet are rigidly'mounted, having provision for adjustment toward and from the pressure roll, substantially as described.

16. A leather skiving machine, having.l in combination, a die roll, a pressure roll, a series of resilient presser feet, a support, means for clamping said presser-feet rigidly upon the support, and means for mounting the support having provision for bodily and angular adjustment of the support, substantially as described.

17. A leather skiving machine, having, in combination, feeding and skiving mechanism, and a hopper provided With a plurality of pivotally mounted guiding members, each of said members having a guide member mounted thereon, and bodily and angularly adjustable With respect thereto, substantially as described.

18. A leather skiving machine, having, in combination, feeding and skiving mechanish, and a hopper provided with a fixed front Wall and With a plurality of guiding members, a portion of said members being supported upon the front Wall and carrying the other members, and all being bodily and angularly adjustable With relation to the front Wall and to one another, substantially as described.

19. A leather skiving machine, having, in combination, feeding and skiving mechanism, yand a hopper provided with a plurality of adjustable guiding devices, each having a guide member bodily and angularly adjustable in all directions in a horizontal plane, substantially as described.

20. A leather skiving machine, having, in combination, feeding and skiving mechanism, a hopper provided With horizontally adjustable vertical guiding members, and gaging mechanism arranged to contact With said members for positioning the latter, substantially as described.

21. A leather skiving machine, having in combination, feeding and skiving mechanism, and a hopper provided with a pair of horizontally adjustable vertical guiding members, an adjustable yoke having a pair of gages arranged to engage the members to position the same, and means for supporting the yoke, substantially as described.

22. A leather skiving machine, having, in combination, feeding and skiving mechanism, and a hopper provided with a plurality of guiding devices bodily adjustable toward and from each other and each carrying a guide member bodily adjustable in all directions in a horizontal plane, substantially as described.

23. A leather skiving machine, having, in combination, feeding and skiving mechanism, and a hopper provided With a plurality of guiding devices adjustable vertically and both bodily and angularly in a horizontal plane, and each carrying a guide member having provision for vertical adjustment and for both bodily and angular adj ustment in a horizontal plane, substantially as described.

24. A leather skiving machine, having, in combination, feeding and skiving mechanism, and a hopper provided with a front Wall and with side Walls carried thereby, each side Wall comprising a plurality of relatively adjustable guiding surfaces arranged to engage a blank at separated points, substantially as described.

25. A leather skiving machine, having, in combination, feeding and skiving mechanism, a table, a plurality of relatively adjustable guiding members adapted to engage the blanks at separate points, and means located above the table for supporting the members, substantially as described.

26. A leather skiving machine, having, in combination, a supporting member extending transversely of the feed, blocks mounted upon said member and adjustable longitudinally thereof, guiding members pivoted in said blocks, guiding devices, and connections between the guiding devices and the guiding members including a plurality of connected pivoted levers, substantially as described.

ELMER E. LANE.

Witnesses CHARLES E. ROGERS, LAURA M. GooDRIDGE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington. D. G. 

